scholarly journals Hierarchically porous carbons as supports for fuel cell electrocatalysts with atomically dispersed Fe–Nx moieties

2019 ◽  
Vol 10 (35) ◽  
pp. 8236-8240 ◽  
Author(s):  
Lei Tong ◽  
Yu-Cheng Wang ◽  
Ming-Xi Chen ◽  
Zhi-Qing Chen ◽  
Qiang-Qiang Yan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Carbon Black ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Full Cell ◽  
Commercial Carbon ◽  
Cell Testing

Fe–Nx–C catalysts fabricated with hierarchically porous carbons instead of commercial carbon black demonstrate enhanced ORR performance under full-cell testing.

Achieving high-powered Zn/air fuel cell through N and S co-doped hierarchically porous carbons with tunable active-sites as oxygen electrocatalysts

2017 ◽  
Vol 365 ◽  
pp. 348-353 ◽  
Author(s):  
Qiaowei Tang ◽  
Luming Wang ◽  
Mingjie Wu ◽  
Nengneng Xu ◽  
Lei Jiang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Sites ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Co Doped

scholarly journals Solid-State Ball-Milling of Co3O4 Nano/Microspheres and Carbon Black Endorsed LaMnO3 Perovskite Catalyst for Bifunctional Oxygen Electrocatalysis

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 76
Author(s):  
Chelladurai Karuppiah ◽  
Balamurugan Thirumalraj ◽  
Srinivasan Alagar ◽  
Shakkthivel Piraman ◽  
Ying-Jeng Jame Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
Fuel Cell ◽  
Solid State ◽  
Carbon Black ◽  
Ball Milling ◽  
Potential Candidate ◽  
X Ray ◽  
Bifunctional Electrocatalyst ◽  
Bet Analysis

Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage and energy conversion devices due to the increasing demand from the consumers. Therefore, the fabrication of a bifunctional electrocatalyst is an emerging focus for the promotion and dissemination of energy storage/conversion devices. Spinel and perovskite transition metal oxides have been widely explored as efficient bifunctional electrocatalysts to replace the noble metals in fuel cell and metal-air batteries. In this work, we developed a bifunctional catalyst for oxygen reduction and oxygen evolution reaction (ORR/OER) study using the mechanochemical route coupling of cobalt oxide nano/microspheres and carbon black particles incorporated lanthanum manganite perovskite (LaMnO3@C-Co3O4) composite. It was synthesized through a simple and less-time consuming solid-state ball-milling method. The synthesized LaMnO3@C-Co3O4 composite was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction spectroscopy, and micro-Raman spectroscopy techniques. The electrocatalysis results showed excellent electrochemical activity towards ORR/OER kinetics using LaMnO3@C-Co3O4 catalyst, as compared with Pt/C, bare LaMnO3@C, and LaMnO3@C-RuO2 catalysts. The observed results suggested that the newly developed LaMnO3@C-Co3O4 electrocatalyst can be used as a potential candidate for air-cathodes in fuel cell and metal-air batteries.

scholarly journals Upgrading pyrolytic residue from waste tires to commercial carbon black

2018 ◽  
Vol 36 (5) ◽  
pp. 436-444 ◽  
Author(s):  
Xue Zhang ◽  
Hengxiang Li ◽  
Qing Cao ◽  
Li’e Jin ◽  
Fumeng Wang
Keyword(s):  
Carbon Black ◽  
Value Added ◽  
Pyrolytic Carbon ◽  
Ultrasonic Waves ◽  
Added Value ◽  
Infrared Spectrometry ◽  
Raman Spectrometry ◽  
X Ray ◽  
Waste Tires ◽  
Commercial Carbon

The managing and recycling of waste tires has become a worldwide environmental challenge. Among the different disposal methods for waste tires, pyrolysis is regarded as a promising route. How to effectively enhance the added value of pyrolytic residue (PR) from waste tires is a matter of great concern. In this study, the PRs were treated with hydrochloric and hydrofluoric acids in turn under ultrasonic waves. The removal efficiency for the ash and sulfur was investigated. The pyrolytic carbon black (PCB) obtained after treating PR with acids was analyzed by X-ray fluorescence spectrophotometry, Fourier transform infrared spectrometry, X-ray diffractometry, laser Raman spectrometry, scanning electron microscopy, thermogravimetric (TG) analysis, and physisorption apparatus. The properties of PCB were compared with those of commercial carbon black (CCB) N326 and N339. Results showed PRs from waste tires were mainly composed of carbon, sulfur, and ash. The carbon in PCB was mainly from the CCB added during tire manufacture rather than from the pyrolysis of pure rubbers. The removal percentages for the ash and sulfur of PR are 98.33% (from 13.98 wt % down to 0.24 wt %) and 70.16% (from 1.81 wt % down to 0.54 wt %), respectively, in the entire process. The ash was mainly composed of metal oxides, sulfides, and silica. The surface properties, porosity, and morphology of the PCB were all close to those of N326. Therefore, PCB will be a potential alternative of N326 and reused in tire manufacture. This route successfully upgrades PR from waste tires to the high value-added CCB and greatly increases the overall efficiency of the waste tire pyrolysis industry.

Lightweight and Efficient Microwave-Absorbing Materials Based on Loofah-Sponge-Derived Hierarchically Porous Carbons

2018 ◽  
Vol 7 (1) ◽  
pp. 1228-1238 ◽  
Author(s):  
Liyang Liu ◽  
Shuang Yang ◽  
Haiyang Hu ◽  
Tieliang Zhang ◽  
Ye Yuan ◽  
...  
Keyword(s):  
Porous Carbons ◽  
Hierarchically Porous ◽  
Microwave Absorbing Materials ◽  
Loofah Sponge ◽  
Absorbing Materials ◽  
Microwave Absorbing

Fuel cell testing of Pt–Ru catalysts supported on differently prepared and pretreated carbon nanotubes

2013 ◽  
Vol 98 ◽  
pp. 94-103 ◽  
Author(s):  
Wojciech Tokarz ◽  
Grzegorz Lota ◽  
Elzbieta Frackowiak ◽  
Andrzej Czerwiński ◽  
Piotr Piela
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cell ◽  
Ru Catalysts ◽  
Cell Testing

scholarly journals Biomass-derived O, N-codoped hierarchically porous carbon prepared by black fungus and Hericium erinaceus for high performance supercapacitor

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 27860-27867
Author(s):  
Xinxian Zhong ◽  
Quanyuan Mao ◽  
Zesheng Li ◽  
Zhigao Wu ◽  
Yatao Xie ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Porous Carbons ◽  
Active Materials ◽  
Hierarchically Porous ◽  
Hericium Erinaceus

Biomass-derived heteroatom self-doped porous carbons are expected to become ideal active materials for high performance supercapacitor.

scholarly journals Electrochemical Performance Improvement of the Catalyst of the Methanol Micro-Fuel Cell Using Carbon Nanotubes

2019 ◽  
Author(s):  
Mohammad Kazemi Nasrabadi ◽  
Amir Ebrahimi-Moghadam ◽  
Mohammad Hosein Ahmadi ◽  
Ravinder Kumar ◽  
Narjes Nabipour
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Carbon Black ◽  
Oxidation Reaction ◽  
High Energy ◽  
Proton Exchange ◽  
Operating Conditions ◽  
High Energy Density ◽  
Methanol Oxidation Reaction

Due to low working temperature, high energy density and low pollution, proton exchange fuel cells have been investigated under different operating conditions in different applications. Using platinum catalysts in methanol fuel cells leads to increasing the cost of this kind of fuel cell which is considered as a barrier to the commercialism of this technology. For this reason, a lot of efforts have been made to reduce the loading of the catalyst required on different supports. In this study, carbon black (CB) and carbon nanotubes (CNT) have been used as catalyst supports of the fuel cell as well as using the double-metal combination of platinum-ruthenium (PtRu) as anode electrode catalyst and platinum (Pt) as cathode electrode catalyst. The performance of these two types of electro-catalyst in the oxidation reaction of methanol has been compared based on electrochemical tests. Results showed that the carbon nanotubes increase the performance of the micro-fuel cell by 37% at maximum power density, compared to the carbon black. Based on thee-electrode tests of chronoamperometry and voltammetry, it was found that the oxidation onset potential of methanol for CNT has been around 20% less than CB, leading to the kinetic improvement of the oxidation reaction. The current density of methanol oxidation reaction increased up to 62% in CNT sample compared to CB supported one, therefore the active electrochemical surface area of the catalyst has been increased up to 90% by using CNT compared to CB which shows the significant rise of the electrocatalytic activity in CNT supported catalyst. Moreover, the resistance of the CNT supported sample to poisonous intermediate species has been found 3% more than CB supported one. According to the chronoamperometry test results, it was concluded that the performance and sustainability of the CNT electro-catalyst show remarkable improvement compared to CB electro-catalyst in the long term.

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